Evaluation Unit for a Medical System

1. An evaluation unit for a signal connected medical system for classifying a current medical treatment situation, the evaluation unit comprising: a receiving module configured to receive treatment signals, wherein a respective treatment signal indicates a value for a patient parameter and a signal quality; a processing module comprising an internal memory in which values of received patient parameters are stored with a respective time stamp indicating a receipt time and with a quality index assigned to the respective value or a group of values, wherein the quality index is based on a signal quality present at the time of reception, wherein the processing module is configured to: detect a presence of a trigger signal; with a detection of the trigger signal, to calculate an evaluation score using a stored calculation rule, the calculation being performed using the stored values of patient parameters as a function of the respective timestamp and wherein an absence of a value of a patient parameter necessary for the calculation of the evaluation score is indicated by the evaluation unit or an absence of a current value for the patient parameter based on the respective time stamp is indicated by the evaluation unit or both an absence of a value of a patient parameter necessary for the calculation of the evaluation score and an absence of a current value for the patient parameter based on the respective time stamp is indicated by the evaluation unit; and calculate at least one quality indicator based on a stored quality metric depending on the associated quality indices of the values of patient parameters necessary for calculating the evaluation score; and an output module configured to provide an output signal that indicates the evaluation score and the quality indicator.

2. An evaluation unit according to claim 1, wherein: the processing module is configured to determine a respective quantitative influence of the patient parameters used to calculate the evaluation score and/or on the calculated quality indicator; and the output module is further configured to indicate the determined quantitative influence of at least one patient parameter.

3. An evaluation unit according to claim 2, wherein the processing module is adapted to determine the quantitative influence using a sensitivity analysis or an error propagation analysis.

4. An evaluation unit according to claim 2, wherein: the output module is further adapted to trigger an output indicating a fault from a predetermined group of faults based on the determined respective quantitative influence of a patient parameter; and the predetermined group comprises at least in part: connection failure with a device providing a patient parameter; device failure of a device providing a patient parameter; a new value required for a patient parameter.

5. An evaluation unit according to claim 1, wherein the evaluation unit is configured to receive the trigger signal via the receiving module, or via a user interface, or via a network interface, or via a device interface or via any combination of the trigger signal, the receiving module, the user interface, the network interface, and the device interface.

6. An evaluation unit according to claim 1, wherein the quality indicator is further dependent on the timestamp of a value of a patient parameter necessary for calculating the evaluation score.

7. An evaluation unit according to claim 1, wherein an absence of a value of a patient parameter necessary for the calculation of the evaluation score and/or of a current value for this patient parameter given the respective time stamp is indicated by an output of a request signal to the connected medical system by the evaluation unit.

8. An evaluation unit according to claim 1, wherein: the evaluation unit is configured to receive static patient parameters and dynamic patient parameters; and the processing module is configured to evaluate only time stamps for values of dynamic patient parameters for the calculation of the evaluation score, whereas values for static patient parameters are evaluated without considering the time stamp.

9. An evaluation unit according to claim 1, wherein the evaluation unit is adapted to receive as static patient parameters age of a patient or gender of a patient or weight of a patient or height of a patient or any combination of age of a patient or gender of a patient or weight of a patient or height of a patient.

10. An evaluation unit according to claim 1, wherein the quality index is based on a time course of a patient parameter and a statistical evaluation of the time course.

11. An evaluation unit according to claim 1, wherein the quality index is based on a time history of signal qualities of treatment signals for a group of received values of a respective patient parameter.

12. An evaluation unit according to claim 1, wherein the calculation of the evaluation score is further based on the respective quality index of used values of the patient parameters.

13. An evaluation unit according to claim 12, wherein the processing module is adapted to consider only values for the calculation of the evaluation score having the quality index in a predetermined index target range.

14. An evaluation unit according to claim 1, wherein the output module is further configured to trigger an alarm in the connected medical system based on the calculated evaluation score and the calculated quality indicator if a predetermined evaluation threshold for the evaluation score is reached and the quality indicator is simultaneously in a quality target range.

15. An evaluation unit in accordance with claim 1, wherein the output signal is configured to be received by a display unit for displaying the evaluation score and the quality indicator.

16. A medical system comprising: a plurality of medical devices, wherein the medical devices are configured and adapted to output treatment signals; an evaluation unit signal connected to the medical devices for classifying a current medical treatment situation, the evaluation unit comprising: a receiving module configured to receive the treatment signals, wherein a respective treatment signal indicates a value for a patient parameter and a signal quality; a processing module comprising an internal memory in which values of received patient parameters are stored with a respective time stamp indicating a receipt time and a quality index assigned to the respective value or a group of values, wherein the quality index is based on a signal quality present at the time of reception, wherein the processing module is configured to: detect a presence of a trigger signal; with a detection of the trigger signal, to calculate an evaluation score using a stored calculation rule, the calculation being performed using the stored values of patient parameters as a function of the respective timestamp and wherein an absence of a value of a patient parameter necessary for the calculation of the evaluation score is indicated by the evaluation unit or an absence of a current value for the patient parameter based on the respective time stamp is indicated by the evaluation unit or both an absence of a value of a patient parameter necessary for the calculation of the evaluation score and an absence of a current value for the patient parameter based on the respective time stamp is indicated by the evaluation unit; and calculate at least one quality indicator based on a stored quality metric depending on the associated quality indices of the values of patient parameters necessary for calculating the evaluation score; and an output module configured to provide an output signal that indicates the evaluation score and the quality indicator.

17. A medical system according to claim 16, wherein adjusting at least one predetermined treatment parameter of a medical device of the plurality of medical devices triggers the trigger signal for the evaluation unit.

18. A medical system in accordance with claim 16, further comprising: a display unit, the display unit being configured to receive the output signal, the display unit being configured to display the evaluation score and the quality indicator based on the output signal.

19. A process for classifying a current medical treatment situation, the process comprising the steps of: receiving a plurality of treatment signals, wherein a respective treatment signal indicates a value for a patient parameter and a signal quality; storing values of patient parameters received at past times with a respective time stamp indicating the past time and a quality index assigned to the respective value or a group of values, wherein for at least one value or a group of values the quality index is based on the signal quality present at the time of reception; detecting a presence of a trigger signal; calculating an evaluation score using a stored calculation rule, the calculation being performed using the stored values of patient parameters as a function of the respective time stamp, and indicating an absence of a patient parameter necessary for calculating the evaluation score or indicating an absence of a current value for the patient parameter in view of the respective time stamp or indicating both an absence of a patient parameter necessary for calculating the evaluation score and an absence of a current value for the patient parameter in view of the respective time stamp; calculating at least one quality indicator based on a stored quality metric depending on the associated quality indices of the values of patient parameters necessary for calculating the evaluation score; providing an output signal, wherein the output signal indicates the evaluation score and the quality indicator.

20. A process in accordance with claim 19, further comprising: providing a display unit; transmitting the output signal to the display unit; displaying the evaluation score and the quality indicator on the display unit.